Fullchee's TIL Tips

TIL: URL() to check for valid URLs has hiccups

You still gotta use a regex

Fullchee Zhang's photo
Fullchee Zhang
·

1 min read

const isValidUrl = url => {
      try { 
          return Boolean(new URL(url)); 
      }
      catch(e){ 
          return false; 
      }
  }

It doesn't check if there's a top-level domain

> new URL('https://google');
URL {origin: 'https://google', protocol: 'https:', username: '', password: '', host: 'google', …}

so you should still use a regex

https://stackoverflow.com/a/3809435/8479344

https?:\/\/(www\.)?[-a-zA-Z0-9@:%._\+~#=]{1,256}\.[a-zA-Z0-9()]{1,6}\b([-a-zA-Z0-9()@:%_\+.~#?&//=]*)
JavaScript